Prusa XL scrubber brush designer buckets

Added some visual flair to what would otherwise have been quite a bland black surface on the fronts of 5 large buckets. Both buckets and slightly revised brush holder are cross-compatible with the originals.

Paint the bucket patterns as desired. Gapless/soluble support interface highly recommended for both underneath the bucket hooks, and under the brush holder backside recess.

Sci Fi Lines Vectors by Vecteezy

Large bucket:

1. added design to the front
2. bevels and fillets to soften frontal appearance
3. tweaked brush holder clearance to be a touch more forgiving

Brush holder:

1. adapted to allow installation with a single M5 button-head screw
2. tweaked lower by 1mm